Sheathed thermocouple with internal coiled wires

摘要

A thermocouple with a tubular metallic sheath extending longitudinally about a sheath centerline; a first wire of a first material within the sheath and coiled about a first centerline lying parallel to the sheath centerline; a second wire of a second material within the sheath and coiled about a second centerline lying parallel to the sheath centerline; a hot junction within the sheath connecting the wires; and a layer of insulation separating the wires from each other and from the sheath.